Attachment for gas stoves



Jan, 27., 1925. I

Q S. I. PEDIGO ATTACHMENT FOR GAS STOVES Filed Nov. 7, 1925 11v ENTOR.

ATTORNEYS.

Patented Jan. .27, 1925.

UNITED STATES SANFORD I. PEDIGO, OF PITTSBURGH, PENNSYLVANIA.

ATTACHIVIENT FOR GAS STOVES.

Application filed November '7, 1923. Serial No. 673,248.

To all whom it may concern:

Be it known that I, SANFORD I. Pnnico, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented cer- .tain new and useful Improvements in Attachments for Gas Stoves, of which the following is a specification.

This invention relates broadly to certain new and useful improvements in cooking stoves of that general type which are designed to burn gas but more particularly to a heat chamber for gas stoves of the class disclosed in my co-pending patent application Serial No. 537,937, and the primary object of the invention is to provide a heat chamber which embodies novel features of construction whereby the heat from the burner is confined and concentrated within the heat chamber, thereby preventing the loss of heat which is incident to the open burners, and enabling a single burner to do the work ordinarily done with several burners, with the result that there is a great saving in the consumption of gas.

Further objects of the invention are to provide a device of this character which is comparatively simple and inexpensive in its construction, which can be applied as an attachment to an ordinary gas stove, which is easily manipulated. and which embodies novel synchronously operable draught elements that will render the device available for the simultaneous performance of a number of distinct cooking operations 'while using'heat currents emanating from a single source only.

Vith the above objects in view the invention consists in certain peculiarities of construction and combination of parts as set forth hereinafter wth reference to the accompanying claimed.

In the drawings:

Figure 1 represents a sectional elevation of a portion of a gas stove, the burner of which is incased within the casing forming the heating chamber embodying the features of my invention.

Figure 2 is a perspective view of the device.

Figure 3 is a top plan view of a modified form thereof.

Figure 4 is a longitudinal sectional view thereof on line IVIV, Figure 3.

'Figure "5' is a sectional view of one of the of the end portions.

drawings and subsequently shutter elements illustrating its pivotal attachment with the operating arm.

Referring in detail to the drawing 1 denotes a casing open at its top and closed at its bottom and which forms a heating chan her 2. The casing 1 includes an imperforate one piece bottom 5 formed with a pair of enlarged circular end portions and an in termediate portion of less width and of greater length than the diameter of either The intermediate por tion is disposed centrally with respect to the end portions. The casing 1 further includes a sectional body portion which conforms in contour to the shape of the bottom 5. The said body portion consists of an inner section 12, an outer section l3 and an intermediate section 14. The sections 12, 13 and 1 1 are of the same shape and vertically disposed with respect to the bottom 5. The section 13 is integral with, as well as having its outer face flush with the edge of the bottom 5. The section 14 contacts against the sections 12 and 13 and is constructed of insulation material. The sections 13 and 14: are mounted upon the upper face of the bottom 5.

The constructing of the casing, in the manner as stated, provides a pair of enlarged vertically disposed cylindrical end portions 3 and 4.. The wall of the portion 4 is continuous throughout, and the wall of the portion 3 is formed with a vertical slot 10 eX- tending from the top and terminating at a point above the bottom of said wall. The slot 10 provides a clearance for the fuel pipe 11 and with the latter supported by the bottom wall of the slot. See Figure 1.

The end portion 3 is for the reception of the burner 9, which is carried by the pipe 11, to position the burner 9 in close proximity to the top of the portion 3.

The casing 1 is to be positioned in the burner pan 6 of a gas stove and is of a height to have its open end abut against the lower face of the stove top whereby the latter will act as the top of the casing.

The enlarged casing ends 3 and 4 are positioned directly under the usual respective openings 15 in the cooking surface 8 and while using the burner 9, with the opening 15 thereabove closed by a cor er or pet, the heat generated by the burner 9 will be transmitted through the chamber 2 toward the enlarged casing end 4. The heat thus emanating through the chamber 2 may be utilized iii for cooking operations which do not require intense heat by placing the cooking receptacle on the other of the openings 15 which latter registers with the open top of the enlarged casing end 4.

The modified form of the device illustrated in Figures 3 and 1 of the drawing, provides a draught opening 16 which is formed adjacent to the upper end of the rear wall of each of the enlarged casing ends 3 and 4. Each of the draught open ings 16 is provided with a respective counterbalanced shutter 17 and 18, which are pivotally connected, as indicated at 19, to the operating arms 20 and 21, respec tively.

The operating arm 20 is pivotally connected to the inner face of the rear wall of the casing 1 by means of the bolt 22 which extends through the elongated slot 23 formed in the arm 20. The pivotal connection and arrangement of the arm 20 allows the shutter 17 to normally drop to the open position by gravity. 7

The operating arm 21 is likewise pivotally connected to the inner face of therear wall of the casing 1 by means of the bolt 24: which extends through the elongated slot 25 formed'in the arm 21. The pivotal connection arrangement of the arm 21 normally maintains the shuttter 18 in the closed position by gravity. I r

'-A damper 26 is mounted centrally in the heating chamber 2 and is carried on the shaft 27 journaled in the side walls of the casing 1. The forward end of the shaft 27 is formed to provide a handle 28 outside of the casing 1 to facilitate the operationof the damper 26.

A stop pin 29 is fixed in the inner face of the casing wall near the upper end thereof on one side of the damper '26, and

' a stop pin 30 is fixed in the inner face of the casing wall near the lower end thereof on the opposite side of the damper 26. The arrangement of the stop pins 29 and 30 allows the shifting of thedamper 26, when in the closed position, in the clockwise direction 7 only,- and limits its return to the closed position in the counter clockwise direction. The arms 20 and 21 are so disposed, relatively to the damper 26, that when the latter is shifted to the open position the upper portion of one side thereof will engage and depress the free end of the arm 20 and elevate the shutter 17 to close the draught opening in the casing associated therewith. In like manner the lower portion of the other side of the damper 26 will simultaneously engage and elevate the free'end of the arm 21 and in consequence shift the shutter 18 to open its associated draught opening 15 in the casing 1.

The :movementfof the arms 20 and 21. is limited, the former by a pair of spaced pins 31 set in the inner face of the casing wall, and the latter by a pair of spaced pins 32 set in the inner face of the casing wall. 7

The outer portions of the arms 20 and 21, which carry respective shutters 1.7 and 18, are disposed rearwardly to provide clearance for their movement when operating the shutters mounted against the inner face of the rear wall in the enlarged casing ends 3 and 4.

The rear face of each of the shutters 17 and 18 is curved horizontally to conform to the curvature of the inner face of the rear wall of the enlarged casing end against which it is adapted to shift vertically.

In practice when the damper 26 is shifted from the closed position to the open position. its engagement with the arm 20 will close the draught opening associated with the shutter 17, while its engagement with the arm 21 will open the draught opening associated with the shutter 18. The burner 9 being mounted in the enlarged casing end 3 the draught therefor will be through the draught opening in the asing end 3 when the damper is closed. However. when the damper 26 is in the open position the draught opening in the casing end 51 is closed and the draught opening in the enlarged casing end 4'. is open, and consequently the heat will be dissipated through the enlarged casing end 4 and cause the heating of the receptacle mounted on the opening in the cooking surface of the stove, which registers with the open top of the enlarged casing end 4.

The elongated slots 23 and 25 in respective arms 20 and 21 together with the pivotal connection 19 of the shutters with respective arms 20 and 21 provide a compensatory shiftable connection, allowing a slight longitudinal movement of the arms 20 and 21 .and the exact vertical movement of the shutters. Such vertical movement of the shutters being essential owing to the currilinear contacting surfaces of the shutterr. with respective inner faces of the rear walls of the enlarged casing ends 3 and 4.

The use of my improveddevice provides an economical article which may be con-- structed to fit a standard type of stove and whereby one burner may be utilized for efficiently accomplishing approximately the same result as two burners under the ordinary conditions.

What I claim is:

1. An attachment for cooking stoves comprising an open top and closed bottom casing providing a heating chamber and formed of an intermediate portion and a pair of substantially enlarged cylindrical end portions, said intermediate portion of the same height, as the end portions and 'jilll further of less width and of greater length than the diameter of either of said end portions, the side Wall of one of said end portions being continuous and the side wall of the other end portion having means for removably supporting a fuel pipe extending therethrough to a burner adapted to be arranged in said end portion.

2. In a cooking device a casing constituting a heating chamber, a damper pivoted in said chamber, said chamber formed with a normally closed and a normally open draught openin a normally closed and a normally open counterbalanced closure member for said draught openings, and means actuated by said damper for synchronously operating said closure members from normal position.

3. In combination a cooking device comprising a casing constituting a heating chamber having enlarged ends, and formed with an open top and with a bottom, each of said enlarged ends provided with a draught opening disposed adjacent to the upper end thereof, a shutter for closing each of said openings, a damper pivotally mounted in said. chamber, a slotted operating arm pivotally connected to each of said shutters, pivots in said chamber extending through the slots of said arms to provide sliding connections therefor, said arms adapted. to be actuated by the movement of said damper for simultaneously shifting one of said shutters to close its associated draught opening and to shift the other of said shutters to open its associated draught opening, substantially as described and for the purpose set forth.

l. An attachment for cooking stoves comprising an open top and closed bottom casing providing a heating chamber and formed of an intermediate portion and a pair of substantially enlarged cylindrical end portions, said intermediate portion of the same height as the end portions and further of less width and of greater length than the diameter of either of said end portions, the side Wall of one of said end portions being continuous and the side wall of the other end portion having means for re movably supporting a fuel pipe extending therethrough to a burner adapted to be arranged in said end portion, said casing adapted to be supported by and within the burner pan of the stove and of a height to abut against the lower face of the top of the stove.

5. An attachment for cooking stoves comprising an open top and closed bottom casing provided a heating chamber, said casing including a bot-tom formed with a pair of enlarged circular end portions and an intermediate portion of less Width and of greater length than the diameter of an end portion. said casing further including a body portion of the same height throughout and further of the same contour as the contour of the bottom and formed of an inner and outer and an intermediate section, said sections arranged in contacting relation and of the same contour throughout, said intermediate section formed of insulation, said outer section integral throughout with said bottom, and one end of said body portion having means for supporting a fuel pipe extending therein for supporting a burner.

In testimony whereof I affix mv signature.

SANFORD I. PEDIGO. 

